Adjustable wrench.



A. GIOYER. ADJUSTABLE WRENCH. APPLICATION FILED JAN.13, 191a.

Patented June 30,1914.

UNITED STATES PATENT UFFIC.

ALESSANDRO GIOYER, OF BELLINZONA, SWITZERLAND.

ADJUSTABLE WRENCH.

To all whom it may concern Be it known that I, ALEssANDRo GIOYER,subject of the King of Italy, resident of San Giovanni Via dellaCaserma, Bellinzona, Switzerland, have invented new and usefulImprovement in Adjustable Wrenches, of which the following is aspecification.

The object of the present invention is an adjustable wrench.

In the annexed drawing a constructional form i shown by way of example.

Figures 1 and 2 are two views of said wrench. Figs. 3 and 4: show thesame partially dismounted, and Figs. 5 to 9 show some details.

The wrench is made of six principal pieces, namely of a handle a, twojaws bc which are capable of sliding in the recesses between thebifurcations of the handle, and of three pins 2), c, 6. At one end thehandle is forked, and each of the bifurcations is provided with a camslot (4 the said slots being arranged in polar symmetry on oppositesides of the pin 6, passing through the said bifurcations, and servingas guides in which the pins b 0 on the jaws Z) and c, respectively, maybe caused to slide, the whole being protected by two round disks d.

In the center of the faces of the fork is fitted the pin -earound whichthe handle revolves. The slots a, are eccentric with regard to the saidpivot e.

The parts above described are assembled a to form the wrench by placingthe jaws b and 0 together so that the portion 0 of the jaw c isintroduced into the socket 72 of the jaw b and the slot Z), and 0 of thejaws b and c are brought into alinement. Thereupon the assembled jawsare introduced into the recess between the bifurcations of the forkedhandle a, whereupon the pins 6 and 0 are passed through the saidbifurcations and the jaws, so that each pin engages one of the cam slotsa a respectively, and the pivot pin 6 is passed through correspondingopenings in the said bifurcations and through the two slots b and 0respectively, the pins are then secured against displace ment in anysuitable or convenient manner. When the parts are so assembled themovement of the handle in the plane of the jaws Specification of LettersPatent.

Application filed January 13, 1913.

Patented June 30, 1914.

Serial No. 741,663.

and with respect to them will cause the pins 6 and c and with them thesaid jaws, to approach or to recede from one another, according to thedirection of said movement. Therefore, working the handle from right toleft, and vice versa, the two jaws draw near or withdraw owing to theaction of the eccentric slots a, and from this movement one can obtainan opening between the jaws varying, for instance, from 10 tomillimeters. i

To screw up a nut one will have to work the handle from right to left,and the unscrewing will be obtained by reversing the wrench.

The universal wrench hereinbefore described is extremely simple andaffords a firm hold of the nut.

Having described my invention what I claim is:

1. In a wrench, a handle and a pivot pin arranged in the head of thesame, and a pair of cams symmetrical with respect to the pivot pin, incombination with a pair of jaws provided with slots engaging the pivotpin of the handle, each jaw engaging one of the cams, respectively, ofthe handle.

2. In a wrench, a handle forked at its head, a pivot pin arranged in thesaid forked portion, and a pair of cams symmetrical with respect to thesaid pivot pin, in combination with a pair of jaws telescopicallyarranged with respect to each other, engaging the forked portion of thehandle and each provided with a slot engaging the pivot pin of thehandle, each jaw engaging one of the cams, respectively, of the handle.

3. In a wrench, a handle forked at its head, a pivot pin arranged in thesaid forked portion, and a pair of cam slots in the forked portion, incombination with a pair of jaws engaging the forked portion of thehandle and each provided with a slot engaging the pivot pin of thehandle, each jaw being provided with a pin engaging one of the camslots, respectively, of the handle.

In testimony whereof I afiX my signature in presence of two witnesses.

ALESSANDRO GIOYER.

Witnesses:

B. GAnLo SALVOTTI, ENRICO VERONELLI.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

